publication . Other literature type . Article . Preprint . 2016

Probing MeV to 90 GeV axion-like particles with LEP and LHC

Joerg Jaeckel; Michael Spannowsky;
  • Published: 01 Feb 2016
  • Publisher: Elsevier BV
  • Country: United Kingdom
Axion-like particles (ALPs), relatively light (pseudo-)scalars coupled to two gauge bosons, are a common feature of many extensions of the Standard Model. Up to now there has been a gap in the sensitivity to such particles in the MeV to 10 GeV range. In this note we show that LEP data on $Z\to\gamma\gamma$ decays provides significant constraints in this range (and indeed up to the $Z$-mass). We also discuss the sensitivities of LHC and future colliders. Particularly the LHC shows promising sensitivity in searching for a pseudo-scalar with $4 \lesssim m_a \lesssim 60$ GeV in the channel $pp \to 3 \gamma$ with $m_{3\gamma}\approx m_{Z}$.
arXiv: Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyHigh Energy Physics::Experiment
free text keywords: Nuclear and High Energy Physics, High Energy Physics - Phenomenology, High Energy Physics - Experiment, QC1-999, Scalar (mathematics), Physics, Nuclear physics, Collider, law.invention, law, Axion, Large Hadron Collider, Standard Model, Particle physics, Physics beyond the Standard Model, Gauge boson
Funded by
The Higgs quest - exploring electroweak symmetry breaking at the LHC
  • Funder: European Commission (EC)
  • Project Code: 316704
  • Funding stream: FP7 | SP3 | PEOPLE
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